The chroot() function is also available on SVR4 platforms (not just GNU and BSD.)
(PHP 4 >= 4.0.5, PHP 5)
chroot — Change the root directory
Changes the root directory of the current process to directory, and changes the current working directory to "/".
This function is only available to GNU and BSD systems, and only when using the CLI, CGI or Embed SAPI. Also, this function requires root privileges.
The path to change the root directory to.
Returns TRUE on success or FALSE on failure.
Example #1 chroot() example
The above example will output:
Note: This function is not implemented on Windows platforms.